We have been fortunate enough to wheel all around the new 6000 series rail cars WMATA is bringing into service, and they seem to be an interesting trade-off from the perspective of wheelchair users.
The biggest change is the lack of vertical poles at either end of each car, leaving a very large space capable of easily taking multiple wheelchairs. This also means that a wheelchair user can travel from one end of the car to the other without serious impediment.
Unfortunately, Metro has made the center of each car the designated wheelchair space (at least going by the lack of wheelchair signage at the ends of the cars), with only two bays.
